High-speed tool



E. I. WENGER. HIGH SPEED TOOL. AFPLICNT llllll EDMAR. 20, 1920.

1,424,536, I Patented Aug. 1, 192-2.

WITNESSES: 1N VEN T0135 A TTORNE Y.

' sired use. tion are to The invention consists and to utilize theshank UNITED! sTATss ,PATENT OFFICE.

arena I. WENGER, or GLE'NELLYN, nunols.

Speciflcation of Letters Patent.

Patented Aug. 1, 1922.

Application mm March 20, 1920. Serial n. 387,481.

To all whbm z't may concern? Be it known that I, EDGAR I. WENGER, a

citizen of Canada (who has declared his in-.

tention of becoming a citizen; of the United States), and residing at Glenellyn, county of Du Page, and State of Illinois, have invented certain new and useful Improvements in a High-Speed Tool, of which the following is a specification.

This invention relates particularly to a lathe tool forhighspeedwork, although, of course, it maybe applied to tools for any de- Among the objects of the invensimplify and reduce the cost of tools of this kind; to produce a tool with the minimum quantity of high speed steel;

material as the base for a cutting tip or edge appear hereinafter. in the novel product, and in the method of producing i. r

In the accompanying drawing, Fig. 1 1s a view illustratinga tip applied to the shank ofva tool utilizing the method of this invention; Fig. 2 is a sectional view of, such a I of high speed stee tip; Fig. 3- is a sectional view illustrating a tip made for a speed cutting or scraping tool as, produced by this 'method; Fig. 4 illustrates the method of producing the tip with an oxyacetylene or similar torch; and

Fig. 5v illustrates the method employed when using a welding arc.

The present method of making high speed tools is totake a soft steel shank and on the tip or cutting edge of it, to weld a piece of high speed steel. Of course, it takes considerable time, trouble and expense to do this, and the present invention is designed and intended to overcome these objections by doing away entirel with the separate block and instead to convert the tip or cutting edge of the steel shank into a hard or high speed steeliby adding thereto tungsten, molybdenum, nickel, manganese, chromium, or whatever combination is necessary for the class of'work in hand, by

' first getting the Softsteelinto a molten conacter of of a tool of cheaper ner,- and the pencil high speed steel is formed as an in-' tegral partof a soft'steel' shank 11 by the employment'of this method,or a thin layer 12 of high speed steel is formed as a part of a shank 13, as illustrated by Fig. 4.

This method can be carried out most readily and accurately by making up a tube or pencil 14, and either having it constituted of or filled up with the other metal or metals which it is desired to add to the shank of the tool in the proportion desired; in heating the steel of the shank until it is in a molten condition; and in then applying the pencil to the molten shank until the metal thereof is worked into the molten metal of the shank so as to form an alloy. This method may be employed by using a blow torch 15 of the oxyacetylene type, or any other suitable heating torch, or the metal may be heated by means of an electric arc, as'illustrated in Fig. 5 in which the source of electric current 16 has one terminal 17 which is applied to a pencil 14, and another terminal 18 which is applied to the shank 19. The application of the pencil to the shank causes an arc, in the well known manof material 14 can be worked into the tip of the shank to the desired extent, as it becomes molten.

By this method, a high ,speed tip or cut-- ting edge can be formed on the shank of any steel tool by applying to it a metal or metals in the proper quantities or combination; there is no loss or waste of material;-the tip is more firmly and integrally united with the shank than where a separate piece is welded on; and any diflerent variety ,of steel or alloy ma be formed on the same shank by adding t wa Y a X high speed type may be formed on the endofashank as shown by Figs. 1 and 2 or acutting edge orsurface may be built up as indicated by Fig. 3. After the tip or cut- :EDGAR I'. WENGER.

e proper materials thereto in this 

